Cradle type ground lug for conduit

Abstract

A grounding device includes an internally threaded collar having an end insulator bushing and provided in its outer peripheral face with a radial coupling socket which has regularly circumferentially spaced longitudinal grooves and a tapped axial bore in its base. A wire clamp includes an elongated base provided at an end thereof with a projecting polygonal shank which slideably engages the socket and grooves to permit the selective angular adjustment of and the angular locking of the wire clamp to the collar. A locking and fastening screw engages a bore coaxially formed in the shank and the tapped bore in the socket base. The wire clamp includes a stationary jaw integrally formed with the base and a screw advanced movable jaw.

I claim: 
     
       1. An electrical cable coupling device comprising a metal coupling member electrically and mechanically connectable to a member of an electrical installation and including a first coupling section, a wire connnector member including a second coupling section coaxially engageable with said first coupling section in a plurality of discrete preselected, incremently separated relatively angularly related positions, one of said coupling sections including a plurality of peripherally spaced radially offset first longitudinally extending abutment faces and the other of said coupling sections including at least one radially offset second abutment face whereby when said coupling sections are in engaged position said second abutment face engages a first abutment face to postively restrict said wire connector member against axial rotation from a preselected angular position and means for releasably locking said wire connector member to said coupling member with said coupling sections in mutual engagement. 
     
     
       2. The electrical coupling device of claim 1 wherein one of said coupling sections includes a socket of non-circular transverse cross-section and the other of said coupling sections includes a shank of non-circular transverse cross-section engageable with said socket. 
     
     
       3. The electrical coupling device of claim 1 wherein said coupling member comprises an internally threaded collar attachable to the externally threaded end of an electrical cable conduit. 
     
     
       4. The electrical coupling device of claim 3 wherein said socket is formed in the outer peripheral face of said collar and said shank defines said second coupling section. 
     
     
       5. The electrical coupling device of claim 2 wherein said socket has a plurality of circumferentially spaced longitudinally extending grooves formed in the peripheral face thereof, said shank includes a radial projection longitudinally slideably engaging a preselected socket groove. 
     
     
       6. An electrical cable coupling device comprising a metal coupling member electrically and mechanically connectable to a member of an electrical installation and including a first coupling section, a wire connector including a second coupling section engageable with said first coupling section in a plurality of preselected relatively angularly related positions, one of said coupling sections includes a socket having a plurality of circumferentially spaced longitudinally extending grooves formed in the peripheral base thereof and the other of said coupling sections includes a shank of polygonal transverse cross-section engagable with said socket, said socket grooves being regularly circumferentially spaced and of a number which is an integral multiple of the number of corner edges of said shank, and means for releasably locking said wire connector member to said coupling member with said coupling sections in mutual engagment. 
     
     
       7. The electrical coupling device of claim 3 wherein said socket has a tapped coaxial bore formed in the base thereof, said shank has a coaxial bore formed therein and said locking means comprises a screw engaging said bores. 
     
     
       8. The electrical coupling device of claim 1 wherein said wire connector member comprises a wire clamp. 
     
     
       9. The electrical coupling device of claim 8 wherein said wire clamp comprises a body member having one of said coupling sections formed thereon, and including an integrally formed stationary jaw and a post longitudinally spaced from said stationary jaw and having a tapped longitudinal bore, and a screw engaging said tapped bore and longitudinally axially movable. 
     
     
       10. The electrical coupling device of claim 9 including a jaw member longitudinally movable along said body member toward and away from said stationary jaw and lying in the axial path of said screw. 
     
     
       11. The electrical coupling device of claim 1 wherein one of said coupling sections includes a circularly extending serrated face and the other of said coupling sections has at least one projection releaseably engaging a depressed portion of said serrated face.